How to pass a list from C# to Ironpython as input parameter of a function

Question

I have a Python script which I use in my C# code (Ironpython), which works fine. So additionally I'd like to add a list as input parameter for my function in the Python script.

I get some strings from a C# WinForm which I have formatted like Python code:

string code = "list [a, b, c, d]";

My additional C# Code:

ScriptSource source = m_engine.CreateScriptSourceFromString(code);
dynamic script = m_engine.ExecuteFile(@"path to my file");
dynamic function = script.UpdateElements(source);

But then I get the following exception:

iteration over non-sequence of type ScriptSource

In my Python file I have a function like this (where source is a list):

def UpdateElements(source):
   #do some stuff

So my question: how can I pass a list of strings from C# as input to my function in the Python script?

Could you extend your sample to show what you are doing with source in UpdateElements? Your exception is probably caused by an iteration like for s in source:... — Simon Opelt
– Simon Opelt, Commented Nov 7, 2013 at 11:09

Simon Opelt · Accepted Answer · 2013-11-07 11:07:59Z

3

Having a list of strings as

var code = "['a', 'b', 'c', 'd']";

You can execute this list literal source to retrieve an IronPython list:

dynamic result = source.Execute();

This list can be used to invoke the function:

dynamic function = script.UpdateElements(result);

As an alternative (if the literal string list is just a workaround and you have the actual values in some other form) you could also provide a .NET collection to your IronPython function and be fine for many scenarios:

var data = new[] { "a", "b", "c", "d" };
var engine = Python.CreateEngine();
dynamic script = engine.ExecuteFile(@"script.py");
dynamic function = script.UpdateElements(data);

answered Nov 7, 2013 at 11:07

Simon Opelt

6,2613 gold badges40 silver badges70 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to pass a list from C# to Ironpython as input parameter of a function

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related